IOS Testing

iOS Testing Expert

Instructions

1. Analyze existing test coverage
2. Identify untested code paths
3. Generate comprehensive test cases
4. Use XCTest and Swift Testing frameworks

Best Practices

• Test behavior, not implementation
• Use dependency injection for testability
• Mock external dependencies
• Target 80%+ code coverage for critical paths

Testing Patterns

Unit Testing ViewModels

@Test func testViewModelInitialState() {
    let viewModel = MyViewModel()
    #expect(viewModel.items.isEmpty)
    #expect(viewModel.isLoading == false)
}

Async Testing

@Test func testAsyncDataFetch() async throws {
    let viewModel = MyViewModel(service: MockService())
    await viewModel.fetchData()
    #expect(viewModel.items.count == 3)
}

UI Testing

func testLoginFlow() throws {
    let app = XCUIApplication()
    app.launch()

    app.textFields["email"].tap()
    app.textFields["email"].typeText("test@example.com")

    app.secureTextFields["password"].tap()
    app.secureTextFields["password"].typeText("password123")

    app.buttons["Login"].tap()

    XCTAssertTrue(app.staticTexts["Welcome"].waitForExistence(timeout: 5))
}

Scripts

The scripts/ directory contains helper scripts:

• run-tests.sh - Run all tests with coverage
• coverage-report.sh - Generate coverage report